The Big Bad Wolf series:
The Heat (No longer available separately. This book can be found in the Big Bad Wolf Romance Compilation.)
El Ardor (Spanish version of The Heat)
The Strip (No longer available separately. This book can be found in the Big Bad Wolf Romance Compilation.)
The Spell
The Hunt
The Big Bad Wolf Romance Compilation (All four books together, in proper chronological order)

The Kings – A Big Bad Wolf spinoff series:
The Vampire King
The Phantom King
The Warlock King
The Goblin King
The Seelie King (Coming April 15, 2014)
(future The Kings books TBA; at least 13 total)